Shock absorber



Aug. 2n, 1,923. mmm S. BURGESS ET AL sHocx ABsoRBE'R Filed Sept. 18, 1922 2 Sheets-Sheet l Aug. 2E, i923.

S. BURGESS 4E'" AL sHocK ABSORBER Filed Sept. 18. 1922` 2 Sheecs-Sheet -2 Vzo Patented rhum 2l, i923.

entren stares FFEQE.,

SYDNEY BURGESS AND WALTER J. BRGESS, E' HAMILTON, ONTARIO, CANADA.

SHOCK ABSORBER.

Application filed September 18, 1922. Serial No. 589,024.

To ZZ 'whom 'it wary concern:

' Be it known that SYDNEY Bimenes and TALTER J. BUnGnSs, both subjects of the King of Great Britian, and residing` at Hamilton, in the countyY of Wentworth and Province of Ontario, Canada, have invented certain new and useful improvements in Shock Absorber-s, of which the following is a specication. Y

Our invention relates to improvements in shock absorbers for motor vehicles and more in particular to shock absorbers for use in connection witii full-elliptic, semi-elliptic,`

and three-quarter-elliptic springs.

rThe invention consists essentially of a rocker arm pivotally connected intermediately of its ends to the lower road spring unit and extending horizontally rearwardly and inclined forwardly, the rear end of said arm being Vpivotally connected to a horseshoe shaped shackle whose opposite end is pivota-lly connected to the upper spring unit or the vehicle frame, the forward end of the said arm being connected to a tensione'd rod whose opposite end is indirectly connected to said frame at an advanced point.

The principal object of the invention is to provide a simple and 'effective shock absorber of such novel construction as to aord the maximum of ei'liciency at an appreciatively less cost than any device previously produced for a similar purpose.

A further` object is to provide a device of this Vchar cter'which may be installed as an accessory on the majority of well known and popular makes of motor vehicles, within a short time, with little labor, and without the mechanic having-to have acquired previous skill or instruction on installation.

attained by the combination, construction and arrangement of parts as willbe hereinafter more fully described, illustrated in the accompanying drawing, and pointed out in the claims hereunto appended.

Referring to the drawing:

Figure l is a side elevation of the present invention in connection with theniore frequently used semi-elliptic spring and vehicle framecextending to a point in vertical alignment with the end of the road spring. Figure 2 is a plan view of the figure shown in Figure L Figure i" a eide elevation of the inven- These. together' with other objects, may be tion as used in connection with a three-quarter or full-elliptic road spring. y

Figure l is a sectional side detailed view of the piston red and cylinder assembly.

Figure 5 is a detailed side elevation of the frame connection assembly for the front shot-k absorber; and,

Figure 6 is a plan view of the assembly shown in Figure 5.

Similar reference characters refer to similar parts throughout the several views.

ln Figures 1 and 2, A indicates the frame of the motor vehicle, and B one of the cross members. C indicates the lower road spring unit in both Figures l and 3, and in Figure 3 D indicates the upper road spring member of a full or semi-elliptic spring.

Supplanting the usual spring shackles connecting the ends of the lower and upper road spring units, or connecting the lower spring with the frame, are horse-shoe shaped shackles 2 and a rocker arm. This rocker arm comprises a cross member 3 upon 'which are formed two rear arms 4: substantially horizontally disposed and parallel with the road spring. The free ends of the arms 4 are bifurcated as indicated at 5, To the inner end of the cross member Sis connected integrally a laterally offset arm G which is disposed forwardly at an incline and together with' 'the arms -t-forms au obtusely angular body at elevation. The free end of the arm 6 is also liifurcated as indicated at 7. rlhe arms Llare connected near the cross member by the bolt 8 which passes intermediately through the shackle bolt eye 9 of the spring unit C. The bolt'S forms a rocker pivot. Y

The horse-shoe shaped shackles 2 are embraced at one end in the bifurcations 7' on the arms l and are pivoted thereto by the bolts 10, and the opposite ends of said shackles are pivotally connected to the end of the frame A by the bolt l1, as shown in Figures l and 2, or to the upper spring unit D, as shown in Figure 3, by the shackle bolt l2 passing through the shackle bolt eye l2.

The bifurcation 7 embraces and is pivotally connected tothe free end of the piston rod 13, to whose opposite end is secured the piston lei adapted to reciprocate in the cylinder Y into the tapped ends of this cylfinder are threaded the end plates 16 and 1T, the ends of the cylindre then. being: peened and pinned against these plates as indicated at 18 and 19 respectively.

The .Vend plate 16 is provided Vwith integral lugs' QOWhieh embrace a link 21 to which it is pivotally secured by the bolt 22, The opposite end of the link 21 is rigidly secured to a fixed member et the `vehicle 'frame A, which may be the cross member li :tor examnle. Y

The piston rod 13 is slidably mounted in a sleeve 23 cored into the end plate 17 and extending a substantial distance into the interior ot the cylinder 15 to provide ample bearinglor-,the said piston rod.

lnterposed in the cylinder 15 between the piston 1Lland the end plate 17 is a spirally coiled expansion spring` 211- normally tex panded and tensioning the piston 1l against the end plate 16, and consequently normally tensioning the rocker arm in the direction indicated on the drawing; by arrows.

The device shown in the drawingl is intended tor the rear road springof vehicles, but may be adapted l'or the liront road spring- Without any changes except the manner in which the cylinder is connected to thel frame7 thereV beine an absence ot cross members near the forward end oit a standard motor vehicle. A bracket 25 secured to 'the frame'fr may be substituted tor the link 21, and-to Which the cylinder is secured in the same manner in Which it is secured to the link.

There has thus been provided a simpleA and effective device tor the purpose speer lied and the class described.

Having now fully described our invention7 what We claim and desire to secure by liietters atent, is

1. In a device el? the class described, the combination with a vehicle 'trame and a road spring, oi' a rocker axially connected to the endct said spring and comprising,` twin arms extending normally in a horizontally disposed position connected by a cross member and a laterally oll'set arm inclined in the opposite direction forming to- Vgether with the twin arms an obtusely an- `Ljularibodyv in elevation, substantially horseshoesliaped shackles linking'the Yfree ends ot' the twin arms with said frame; and means connecting the lree end of the oll'set arm to the frame at a point remote 'from the ends oit said twin arms with the other road. spring unit, and means connecting the treev end ot' said offset armto the frame remote from the point Where said shackles are linked to thesecond road spring unit, and tensioned to retard the axiall movement et said rocker under varying` load.

3. ln a device of the class described, the combination with vehicle frame and a road spring, oia rocker axially connected to the end of said spring and comprising twin arms extending` normally in a horizontally disposed position connected bya cross member and a laterally ollsetarm inclined in the opposite direction iorming together With tlie Vtwin arms aan obtusely angular body in elevation, substantially horse-shoe s iaped shackles linking` the free ends oi' the twin arms VWith said l'rame, a cylinder pivot-ally connected to the trame at a point remote from the tirst mentioned frame connection, a piston and piston rod reciprocally7 mounted in said cylinder, said piston rod beingV pivotally connected to the 'tree end or said oitl'set arm and normally disposed at an angle therewith, means 'Within said cylinder 'tor tensioning said piston and piston rod relatively closer to the point of connection between the cylinder and frame to retard the axial movement-ot said rocker under 'varying load. Y

ln testimonyV whereof We have atligied our signatures. Y Y i y SYDNEY BURGESS.

p WALTER J. BURGESS. lVitnesses: f Y

H. G. HENDRY,

J'. D. EARLE.. 

